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<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial>I assume you're talking about the case where the car is still
positive ground?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial>I'm sure it could be done. Sure would be a lot simpler
and easier (and less chance for disaster if east should meet west) to just
convert the car to negative ground, though. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial>There would be no need to completely isolate the secondary
negative ground system from the body (most radios have a ground path through the
antenna mount anyway). You could just connect the negative side of the
secondary battery to ground. There is also nothing needed at the point you
have marked "regulator or control box", unless perhaps you want to put in a
master switch or add a connector for the trickle charger.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial>You could even setup an isolated DC-to-DC converter to charge
the secondary battery from the main battery. (And if it had enough
capacity, even eliminate the battery entirely).</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=791454121-12032015><FONT color=#0000ff
size=2 face=Arial>Yet another option (though not one I would particularly
recommend) is to just install outlets wired negative ground, isolated from the
body. As long as your computer, GPS, etc don't touch bare metal in any
other way, that will work fine. Watch out for the radio, though, many of
them have paths to ground through both the case and the antenna, even if they do
have separate ground leads.</FONT></SPAN></DIV><!-- Converted from text/plain format -->
<P><FONT size=2>-- Randall </FONT></P>
<DIV> </DIV><BR>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"
dir=ltr>
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<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> Triumphs
[mailto:triumphs-bounces@autox.team.net] <B>On Behalf Of </B>Carl
TR<BR><B>Sent:</B> Thursday, March 12, 2015 2:32 PM<BR><B>To:</B>
Triumphs@autox.team.net<BR><B>Subject:</B> [TR] Accessory power in +ground
TR3<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=WordSection1>
<P class=MsoNormal>Has anyone installed a second battery (-ground) to power
accessories in a TR3? I am planning a fairly lengthy road trip
this summer and would like the benefits of GPS, phone charger, and maybe
computer hookup. <o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I am wondering if it is possible to create a completely
closed wiring setup for that purpose using a smaller motorcycle or marine
battery. It would require charging periodically (or a trickle charger)
and be completely insulated from the body/frame. <o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>What would I need between the battery and accessory outlets
(besides a fuse box)? <o:p></o:p></P>
<P class=MsoNormal><IMG id=Picture_x0020_2 src="cid:791454121@12032015-1550"
width=1201 height=415><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Any thoughts or suggestions? (or is it even
possible?)<o:p></o:p></P>
<P class=MsoNormal>Thanks<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">Carl<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">1961 Triumph TR3A –
TS81802LO<o:p></o:p></SPAN></P>
<P class=MsoNormal>http://mysite.verizon.net/cfmtr3a/ - Verizon has
discontinued the mysite URL. Looking for a new home.<o:p></o:p></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">Tampa,
FL<o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P></DIV></BLOCKQUOTE></BODY></HTML>